And george weber



(No Model.)

JIG, HOFF AN 88 G. WEBER. .MEGHANISM BOB. OPERATING FAN BLOYWERS. No. 310,681. Patented Jan 1 1885.,

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JOHN G. HOFFMAN, OF NE? YORK, AND GEORGE WVEBER, OF BROOKLYN, ASSIGNORS TO THE J. G. HOFFMAN MANUFACTURING COMPANY, OF

BROOKLYN, n. Y.

MECHANlSlV! FOR OPERATlNG FAN-=BLOWERS.

SPECIFICATION forming part of Letters Patent No. 310,681, dated January 13, 1885.

(No model.)

To aZZ whom it may concern:

Be it known that we, J OHN G. I'IOFFMAN, of the city and countyof New York, in the State of New York, and GEORGE WVEBER, of the city of Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Mechanism For Operating Fan-Blowers, of which the following is a specification.

Our invention relates to mechanism, which may be operated by hand, for imparting rotary motion to fan-blowers of small size, such as are commonly used for blacksmiths forges.

In the Letters Patent granted to John R. Rowlands, No. 293,360, dated February 12,

1884, is shown and described a mechanism for rotating a large pulley, from which motion is transmitted by a belt to the fan of the blower. This mechanism consists of a rocking 29 frame which has an oscillating or reciprocating motion imparted by a hand-lever, and which carries a drive-chain engaging with a flange or hub loose upon the pulley-shaft. Fast upon said shaft is a ratchet-wheel, and the said loose flange or hub carries pawls which engage with said ratchet-wheel and impart motion to it and the pulley-shaft when said frame is swung or moved in one direction, and play idly over said ratehetwheel when 33 the frame is swung or moved in a reverse di rection. By this mechanism an intermittent impulse is imparted to the pulley,and the mo mentum of the pulley and fan produces an approximately uniform and continuous rotary 3 5 motion.

Our invention consists in novel combinations of parts, whereby motion may be lli1- parted to the pulley-shaft by the use of a rocking frame without the use of-a chain, and

' in other combinations of parts, whereby a hand-crank, which fits loosely upon and de pends idly from the pulley-shaft when the latter is to be operated by said rocking frame, is made operative to turn the shaft by simply moving it by the hand in the proper direction to turn the pulley-shaft.

These several combinationsof parts are hereinafter described, and set forth in the claims.

In the accompanying drawings, Figure 1 is a side elevation of a fan-blower and operating mechanism therefor embodying our inven tion. Fig. 2 is an end elevation thereof. Fig.

3 is a detail sectional view of certain parts in i a plane parallel with the pulley-shaft, and on a larger scale; and Figs. at and 5 are detail views illustrating modifications of our invention.

Similar letters of reference designate corresponding parts in the several figures.

A designates the base-plate, whereon is se cured, by any suitable means, a blower, B, which may be of any suitable construction.

The upright frame for supporting the mechanism consists of two similar frames, (J 0, connected by erossties or stretchers a a.

D designates a drivingshaft, on which is fixed a pulley, D, and from this pulley mo tion is transmitted by a belt, D, to the pulley b of the fan B. The fan may be secured in such position on the base A that its pulley b, on whichever side of the blower it may be, will be in line with the pulley D, or so that a blower having a pulley, b, on each .side may be so placed on the base as to receive the belt D on one or the other of said pulleys, as may be desired.

As here shown, the shaft D is mounted in bearings 0, which are made separate from the side frames, 0, and are adj ustable in openings 0* therein. Each bearing has a flange, c, and is secured to its frame by a bolt, cl, passing through a slot in said flange.

Upon the shaft D is securely fixed a ratchetwheel, 0, having an internally-ratchet-toothed rim, 6', and between said ratchet-wheel and the adjacent frame is a flange or hub,f, loosely fitting the shaft, and carrying pawlsf,which engage with the ratchetwheel e. We have. here shown four pawls, f, which are simply pivoted to the flange f, and are unprovided with springs. Vhen one or more I of these pawls come above the ratchet-wheel 6, it falls into secure engagement therewith by gravitation, and as said pawls come below the ratchet-wheel they drop out of engagement therewith and upon stop-pins f which prevent them from dropping too far away from the wheel. WVe make no claim, broadly, to this arrangement of pawls.

On the inner side of the flange or hub f is 00 cast or securely fixed a pinion, g, and with 1 this pinion engages a gear segment or sector, h, which forms part of a rocking frame, E, fulcrumed ate to one of the frames 0.

In order to facilitate the smooth and noiseless running of the pinion g and gear-segment h, we form the pinion with a smooth cylindric bearing-surface, g, at the side thereof, and the gear-segment h with a correspondinglysmooth bearing-surface, h. These features are best shown in Fig. 3.

F designates a hand-lever fulcrumed at j to the frame E, and capable of lateral movement on a bearing surface or bracket, j, projecting from the frame, as shown in Fig. 1. When the lever Fis depressed, the segment h, acting upon the pinion 9, turns the flange fin a direction to cause its pawls f to engage the ratchet-wheel e, and so turn the shaft D and belt-pulley D. When the lever F is raised, the flange f and pawls move in a reverse direction, and the pawls play idly over the ratchet-wheel e, the latter moving ahead by reason of the momentum of the pulley D. The return or backward movement of the frame E is assisted by a counterbalanceweight, is.

The pawls f and ratchet-wheel 0 form a clutch-connection between the flange f and the shaft D, but, in connection with the gear on the shaft and the gear-segment on the rocking frame E, any other well-known or suitable form of clutch may be used.

The adjustable bearings c afford provision for adjusting the pinion g relatively to the gearsegment h, which drives it, so that the intermeshing gearing will run as noiselessly as possible; and if the bearings be made slightly flaring toward the opposite ends one or other of the bearings may be adjusted to cause the pulley D to run in a truly vertical plane.

In lieu of the pinion g and segment h, we

may employ a gear wheel or pinion, and

gear-segment if, having teeth of slight projection and of undulating or wavy profile, as shown in Fig. 4; or, if desired, friction-gearingmay be substituted, as shown in Fig. 5. In the latter figure the pinion or gear wheel may be covered with rubber or leather 0, to increase friction, and the segment frictiongear h**, carried by the rocking frame E, works in tight frictional contact with said friction pinion or wheel.

, The friction-gearing has the advantage of being noiseless in its operation; but in order to provide for the careful adjustment of the parts the friction-segment h may be connected with the rocking frame E by bolts 1, as shown in Fig. 5.

The adjustable bearings c are particularly desirable when a friction-pinion, g**, is used, as they provide for properly adjusting the pinion relatively to the segment-gear h whether or not the latter is adj ustably-secured to the rocking frame.

In many cases it is desirable, in addition to the rocking frame and hand-lever E F, to have a hand-crank for turning the shaft D directly by hand. To this end we provide a hand-crank, G, which depends loosely from the shaft D, so long as the mechanism is operated by the lever F, and which carries a pawl, engaging with the internally-toothed ratchet-rim e by gravity. So long as the lever F is employed as a means of operating the mechanism the crank G hangs idly, and the ratchet-teeth 6 play idly under the pawl as the wheel 6 is turned in the direction of the arrow, Fig. 1.

When it is desired to employ the handcrank G, all that is necessary is to grasp the crank and turn it in the direction of the arrow, Fig. l, whereupon the pawl will remain in firm engagement with the ratchetteeth 6, and will turn the wheel and shaft continuously.

WVhat we claim as our invention, and desire to secure by Letters Patent, is

1. The combination, with the driving-shaft and pulley or wheel, of a gear wheel or pinion loose on said shaft, and a rocking frame provided with a segment-gear engaging with said gear wheel or pinion, a clutch-connection between said gear wheel or pinion and shaft for turning the shaft in one direction only, and bearings for said shaft capable of adjustment to adapt said gear wheel or pinion to said segment-gear, substantially as herein described.

2. The combination, with the driving-shaft and its pulley or wheel, of a gear wheel or pinion loose on the shaft, a rocking frame provided with a segment-gear engaging with said wheel or pinion, said gear or pinion and. segment being provided with smooth adjacent bearing-surfaces, and a clutch-connection between said gear wheel or pinion and said shaft for rotating said shaft in one direction only,

substantially as herein described.

3. The combination, with the driving-shaft and pulley or wheel thereon, of a rocking frame and hand-lever, and devices, substantially such as described, for rotating said shaft, an internally-ratchet-toothed wheel upon said shaft, and a hand-crank depending from saidshaft and having a pawl capable of engagement with said internallytoothed ratchetwheel, substantially as herein set forth.

4. The combination of the shaft D and pul- -ley D, and a wheel fast on said shaft and pro- JOHN G. HOFFMAN. GEORGE IVEBER.

Vitnesses:

O. .HALL, O. E. SUNDGREN. 

